Make a datepicker script compatible with jquery 1.9 ?

Make a datepicker script compatible with jquery 1.9 ?

Hi there!

I adapted a few months ago a datePicker script to my needs (basically selecting multiple days by clicking on the different dates).
The original script : http://www.kelvinluck.com/assets/jquery/datePicker/v2/demo/datePickerMultiMonth3.html

Here is the way it works well (you can see that you can select multiple days) : http://www.imerege.com/FTPdivers/CeA/test/index.html

Problem is: I'm moving to a Bootstrap website, using the latest versions of Jquery... And it seems that my datePocker doesn't like it, as it no longuer works with 1.3+ (I think).
Exemple (the calendar doesn't pop up, event using the migrate code) : http://www.imerege.com/FTPdivers/CeA/test/index2.html

i'm clearly a newby in javascript, and had many problems to make it work at first...
=> I'd like to know if I can keep the script, and fix it quickly (but I don't know where to look at to understand where it is broken
=> ... and if not possible, do you know any datepikcer script with multiple days selection (on a single calendar, without using a "range" form (ie from xxx to yyy)) ?


Merci ;)

Jérémie.